lkml.org 
[lkml]   [2015]   [Sep]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH] fs-writeback: drop wb->list_lock during blk_finish_plug()
From
On Fri, Sep 11, 2015 at 4:06 PM, Chris Mason <clm@fb.com> wrote:
>
> Originally I was worried about the latency impact of holding the
> plugs over more than one super with high end flash. I just didn't want
> to hold onto the IO for longer than we had to.
>
> But, since this isn't really latency sensitive anyway, if we find we're
> not keeping the flash pipelines full the right answer is to short
> circuit the plugging in general. I'd agree actual throughput should be
> the same.

Yeah, this only triggers for system-wide writeback, so I don't seer
that it should be latency-sensitive at that level, afaik.

But hey, it's IO, and I've been surprised by magic pattern
sensitivites before...

Linus


\
 
 \ /
  Last update: 2015-09-12 02:01    [W:0.124 / U:0.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site